<template>
  <div>
        <!-- 面包屑 -->
     <el-breadcrumb separator-class="el-icon-arrow-right">
         <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
         <el-breadcrumb-item>权限管理</el-breadcrumb-item>
         <el-breadcrumb-item>角色列表</el-breadcrumb-item>
      </el-breadcrumb>

      <!-- 卡片视图 -->
      <el-card>
           <!-- 添加按钮区域 -->
          <el-row>
              <el-col>
                  <el-button type="primary" @click="add=true">添加角色</el-button>
              </el-col>
          </el-row>

          <!-- 角色列表区域 -->
          <el-table :data="rolelist">
                 <!-- 展开列-->
              <el-table-column type="expand">
                  <template v-slot="scope">
                      <el-row :class="['bdbottom',i1===0 ? 'bdtop':'','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id" >
                          <!-- 渲染一级权限-->
                          <el-col :span="5">
                              <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                              <i class="el-icon-caret-right"></i>
                          </el-col>
                          <!-- 渲染二和三级权限-->
                          <el-col :span="19">
                              <!-- 通过for循环，嵌套渲染二级权限-->
                              <el-row :class="[i2===0 ?'':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id" >
                                  <el-col :span="6">
                                      <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                                      <i class="el-icon-caret-right"></i>
                                  </el-col>
                                  <el-col :span="18">
                                      <el-tag type="warning" v-for="item3 in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">
                                          {{item3.authName}}
                                      </el-tag>
                                  </el-col>
                              </el-row>
                          </el-col>
                      </el-row>
                  </template>
              </el-table-column>
                   <!-- 索引列-->
              <el-table-column type="index"></el-table-column>
              <el-table-column label="角色名称" prop="roleName"></el-table-column>
              <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
              <el-table-column label="操作" width="300px">
                    <template v-slot="scope">
                        <el-button size="mini" type="primary" icon="el-icon-edit" @click="editUser(scope.row.id)">编辑</el-button>
                        <el-button size="mini" type="danger" icon="el-icon-delete" @click="editdelete(scope.row.id)">删除</el-button>
                        <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                    </template>
                </el-table-column>
          </el-table>
      </el-card>

        <!-- 添加角色的对话框 -->
      <el-dialog title="" :visible.sync="add" width="30%" @close="addDialogClosed">
       <!-- 内容主体区 -->
        <el-form :model="addUsers" ref="addUsersref" label-width="100px" >
           <el-form-item label="角色名称" prop="roleName">
           <el-input v-model="addUsers.roleName"></el-input>
        </el-form-item>

        <el-form-item label="角色描述" prop="roleDesc">
           <el-input v-model="addUsers.roleDesc"></el-input>
        </el-form-item>

        </el-form>

        <!-- 底部区域-->
        <span slot="footer" class="dialog-footer">
        <el-button @click="add = false">取 消</el-button>
        <el-button type="primary" @click="addUser">确 定</el-button>
        </span>
      </el-dialog>


     <!-- 编辑角色的对话框 -->
      <el-dialog title="" :visible.sync="edit" width="30%" @close="addDialogClosed">
       <!-- 内容主体区 -->
        <el-form :model="editUsers" ref="editUsersref" label-width="100px" >
           <el-form-item label="角色名称" prop="roleName">
           <el-input v-model="editUsers.roleName"></el-input>
        </el-form-item>

        <el-form-item label="角色描述" prop="roleDesc">
           <el-input v-model="editUsers.roleDesc"></el-input>
        </el-form-item>

        </el-form>

        <!-- 底部区域-->
        <span slot="footer" class="dialog-footer">
        <el-button @click="edit = false">取 消</el-button>
        <el-button type="primary" @click="tyedit">确 定</el-button>
        </span>
      </el-dialog>

     <!-- 分配权限的对话框 -->
      <el-dialog
        title="分配权限"
         :visible.sync="setRightDialogVisible"
        width="30%" @close="setRightDialogClosed">
        <!-- 树形控件 -->
        <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all	:default-checked-keys="defKeys" ref="treeRef"></el-tree>

       <span slot="footer" class="dialog-footer">
       <el-button @click="setRightDialogVisible = false">取 消</el-button>
       <el-button type="primary" @click="allotRights">确 定</el-button>
       </span>
</el-dialog>
  </div>
</template>

<script>
export default {
    name:'',
    data() {
        return {
            //所以角色列表数据
            rolelist:[],
            //添加用户的表单数据
            addUsers:{
                roleName:'',
                roleDesc:''
            },
            //打开添加角色页面
            add:false,
            //打开编辑角色页面
            edit:false,
            //得到的修改角色的信息
            editUsers:{},
            //分配权限的对话框
            setRightDialogVisible:false,
            //所有权限的数据
            rightslist:[],
            //树形控件的属性绑定对象
            treeProps:{
                label:'authName',
                children:'children'
            },
            //默认选中的节点id值
            defKeys:[],
            roleId:''
        }
    },
    created(){
        this.getRolesList()
    },
    methods: {
        //获取角色列表
      async  getRolesList(){
         const {data:res} = await this.$http.get('roles')
          if(res.meta.status!==200){
                  return  this.$message.error('获取角色列表失败')
                }
            this.rolelist=res.data
            console.log(res);
        },
        //监听添加用户的对话框的关闭事件
        addDialogClosed(){
            this.$refs.addUsersref.resetFields()
        },
        addDialogClosed(){
            this.$refs.editUsersref.resetFields()
        },
        //添加用户
        addUser(){
            this.$refs.addUsersref.validate(async valid=>{
                if(!valid) return
                
           const {data:res} = await this.$http.post('roles',this.addUsers)
           console.log(res);
           if(res.meta.status!==201){
                    this.$message.error('添加用户失败')
                }
                this.$message.success('添加用户成功')
                //隐藏添加用户的对话框
                this.add = false
                //重新获取用户的列表
                this.getRolesList()
            })
        },
        //编辑角色
       async editUser(id){
           const {data:res} = await this.$http.get('roles/'+id)
           if(res.meta.status!==200){
                  return  this.$message.error('查询用户失败')
                }
            this.editUsers = res.data
            this.edit=true
        },
        //提交修改的用户信息
         tyedit(){
           this.$refs.editUsersref.validate(async valid=>{
               if(!valid) return 

             const {data:res} = await this.$http.put('roles/'+this.editUsers.roleId,{
              roleName:this.editUsers.roleName,roleDesc:this.editUsers.roleDesc})
              
                 if(res.meta.status!==200){
                  return  this.$message.error('更新用户信息失败')
                }
                this.getRolesList()
                 this.edit=false
           } )
        },
        //删除用户
       async editdelete(id){
          const confirmResult= await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
            }
          ).catch(err=>{
              return err
          })

          //如果用户确认删除,返回confirm
          //如果用户确认删除,返回cancel
          if(confirmResult !== 'confirm'){
              return this.$message.info('已取消删除')
          }
          const {data:res}= await this.$http.delete('roles/'+id)
          if(res.meta.status!==200){
                  return  this.$message.error('删除用户失败')
                }
                this.$message.success('删除用户成功')
                this.getRolesList()
        },

        //根据id删除对应的权限
       async removeRightById(role,rightId){
            //弹框提示用户是否删除
          const confirmResult= await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
            }
          ).catch(err=>{
              return err
          })

          //如果用户确认删除,返回confirm
          //如果用户确认删除,返回cancel
          if(confirmResult !== 'confirm'){
              return this.$message.info('已取消删除')
          }
         const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
           if(res.meta.status !== 200){
                  return  this.$message.error('删除权限失败')
                }
                role.children = res.data
          },


          //展示分配权限的对话框
         async showSetRightDialog(role){

             //获取id值，为确认按钮逻辑准备
             this.roleId=role.id
             
              //获取所有权限的数据
            const {data:res} = await  this.$http.get('rights/tree')
              if(res.meta.status!==200){
                  return  this.$message.error('获取权限数据失败')
                }
                this.rightslist=res.data
                console.log(res);

                //递归获取三级权限的id
                this.getLeafKeys(role,this.defKeys)

              this.setRightDialogVisible=true
          },

          //通过递归的形式，获取角色下所有三级权限的id，并保存到defKeys数组中
          getLeafKeys(node,arr){
              if(!node.children){
                  return arr.push(node.id)
              }
              node.children.forEach(item =>this.getLeafKeys(item,arr))
          },

          //监听分配权限对话框的关闭事件
          setRightDialogClosed(){
              this.defKeys=[]
          },

          //点击确认为角色分配权限
         async allotRights(){
              const keys=[
                  ...this.$refs.treeRef.getCheckedKeys(),
                  ...this.$refs.treeRef.getHalfCheckedKeys()
              ]
              const idStr=keys.join(',')

            const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
                if(res.meta.status!==200){
                  return  this.$message.error('分配权限数据失败')
                }
                this.$message.success('分配权限数据成功')
                this.getRolesList()
                this.setRightDialogVisible=false
          }

    }
          
}
</script>

<style>
.el-tag{
    margin: 7px;
}
.bdtop{
    border-top: 1px solid #eee;
}
.bdbottom{
    border-bottom:1px solid #eee
}
.vcenter{
    display: flex;
    align-items: center;
}
</style>